If you're using Excel to calculate dates, it is useful to know how to add (or subtract) a certain number of working or business days to a date. This lesson introduces the WORKDAY() function and shows you how to use it.
When you are working with a large spreadsheet in Microsoft Excel, it's easy to find yourself scrolling down or across and losing track of where you are. This lesson explains how to freeze rows and columns (officially known as "Freeze Panes") in Excel 2010 for Windows and Excel 2011 for Mac.
This lesson explains how to use Excel's logical operators and logical functions (AND, OR, NOT). These boolean operators can be used in a number of ways, either on their own, or to complement other Excel functions. In many cases, you can even use one of these functions instead of a more complicated function. For example, it is often easy to rewrite an IF statement using either AND or OR. This lesson includes examples of how to do this.
When writing a formula that references other cells, it can sometimes be useful to check that those cells contain a valid value. In this lesson, we'll look at Excel's ISNUMBER function as a way of doing this.
When printing in Excel 2010 for Windows, it is sometimes useful to print a set of rows (e.g. column headings) on each page in the print out. There is nothing worse than having a printout that runs to multiple pages, with the column headings only printed on the first page. This lesson shows you how to get header rows printing at the top of every page.
The COUNTIFS function in Excel counts the number of cells in a range that match a set of multiple criteria. COUNTIFS extends the COUNTIF function which only allows one criteria. It is similar to SUMIFS, which will find the sum of all cells that match a set of multiple criteria. This lesson shows you how to use COUNTIFS and provides some practical examples to help you understand how it works.